2311221120020 has 24 divisors (see below), whose sum is σ = 4933130983368. Its totient is φ = 909332899200.

The previous prime is 2311221119947. The next prime is 2311221120077. The reversal of 2311221120020 is 200211221132.

It can be written as a sum of positive squares in 4 ways, for example, as 3459086596 + 2307762033424 = 58814^2 + 1519132^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 947220551 + ... + 947222990.

It is an arithmetic number, because the mean of its divisors is an integer number (205547124307).

Almost surely, 2^{2311221120020} is an apocalyptic number.

2311221120020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2311221120020 is an abundant number, since it is smaller than the sum of its proper divisors (2621909863348).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2311221120020 is a wasteful number, since it uses less digits than its factorization.

2311221120020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1894443611 (or 1894443609 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 2311221120020 its reverse (200211221132), we get a palindrome (2511432341152).

The spelling of 2311221120020 in words is "two trillion, three hundred eleven billion, two hundred twenty-one million, one hundred twenty thousand, twenty".